One-Pot Multicomponent Synthesis and Cytotoxic Evaluation of Novel 7-Substituted-5-(1H-Indol-3-yl)Tetrazolo[1,5-a] Pyrimidine-6-Carbonitrile
Abstract
:1. Introduction
2. Results and Discussion
2.1. Chemistry
2.2. Cytotoxicity Screening
3. Structure–Activity Relationship
4. Experimental
4.1. General Methods
4.2. General Procedure for the Synthesis of 7-Substituted-5-(1H-indol-3-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4a–i
4.2.1. 7-(4-Chlorophenyl)-5-(1H-indol-3-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4a
4.2.2. 5-(1H-Indol-3-yl)-7-(4-nitrophenyl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4b
4.2.3. 7-(4-Bromophenyl)-5-(1H-indol-3-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4c
4.2.4. 7-(2-Hydroxyphenyl)-5-(1H-indol-3-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4d
4.2.5. 5-(1H-Indol-3-yl)-7-(2-nitrophenyl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4e
4.2.6. 5-(1H-Indol-3-yl)-7-(thiophen-2-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4f
4.2.7. 7-(Furan-2-yl)-5-(1H-indol-3-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4g
4.2.8. 5-(1H-Indol-3-yl)-7-(1H-pyrrol-2-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4h
4.2.9. 5,7-di(1H-Indol-3-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile 4i
4.3. Materials and Methods
4.3.1. In-Vitro Cytotoxic Activity
4.3.2. MTT Cytotoxicity Assay
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample Availability: Samples of the compounds are available from the authors. |
Entry | Base (mmol) | Solvent | Temp. (°C) | Time (h) | Yield (%) |
---|---|---|---|---|---|
1 | - | EtOH | 80 | 10 | - |
2 | Et3N | EtOH | 80 | 10 | Trace |
3 | Et3N | CH3CN | 80 | 10 | 12 |
4 | Et3N | 1,4-Dioxane | 80 | 10 | 15 |
5 | Et3N | Toluene | 120 | 10 | - |
6 | Et3N | DMF | 120 | 10 | 76 |
7 | Piperidine 0.5 | DMF | 120 | 10 | 65 |
8 | DMAP 0.2 | DMF | 120 | 10 | 40 |
9 | Pyridine | DMF | 120 | 10 | 35 |
10 | KOH | CH3CN | 80 | 8 | 22 |
11 | NaOH | CH3CN | 80 | 8 | 27 |
12 | K2CO3 | CH3CN | 80 | 8 | Trace |
Compound Code | IC50 (µM) ± SD | ||||
---|---|---|---|---|---|
HCT-116 | MCF-7 | MDA-MB-231 | A549 | RPE-1 | |
4a | 20.4 ± 2.1 | 32.5 ± 2.4 | 21.1 ± 2.1 | 20.9 ± 2.1 | 61.5 ± 2.5 |
4b | 14.1 ± 1.5 | 28.1 ± 2.1 | 22.5 ± 2.9 | 22.4 ± 1.8 | 56.3 ± 3.1 |
4c | 14.2 ± 1.7 | 22.0 ± 1.8 | 19.4 ± 3.1 | 24.7 ± 2.3 | 42.4 ± 2.8 |
4d | 23.1 ± 2.2 | 25.7 ± 2.1 | 16.2 ± 2.3 | 22.7 ± 2.1 | 31.8 ± 3.1 |
4e | 26.6 ± 2.1 | 17.6 ± 1.5 | 19.7 ± 2.8 | 25.6 ± 1.9 | 50.9 ± 2.9 |
4f | 31.9 ± 2.6 | 23.9 ± 1.9 | 30.6 ± 2.2 | 25.9 ± 2.1 | 62.4 ± 2.8 |
4g | 28.8 ± 1.9 | 26.3 ± 2.5 | 31.1 ± 2.9 | 26.0 ± 2.3 | 60.4 ± 3.4 |
4h | 14.6 ± 1.5 | 26.0 ± 2.1 | 26.3 ± 1.8 | 27.5 ± 2.5 | 67.5 ± 3.9 |
4i | 19.9± 2.1 | 24.8 ± 2.4 | 27.4 ± 2.3 | 26.6 ± 2.1 | 77.2 ± 3.8 |
Doxorubicin | 17.2 ± 1.5 | 17.5 ± 2.1 | - | 27.0 ± 2.4 | 66.1 ± 3.5 |
5-Fluorouracil | - | - | 3.8 ± 0.2 | - | - |
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Radwan, M.A.A.; Alminderej, F.M.; Awad, H.M. One-Pot Multicomponent Synthesis and Cytotoxic Evaluation of Novel 7-Substituted-5-(1H-Indol-3-yl)Tetrazolo[1,5-a] Pyrimidine-6-Carbonitrile. Molecules 2020, 25, 255. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules25020255
Radwan MAA, Alminderej FM, Awad HM. One-Pot Multicomponent Synthesis and Cytotoxic Evaluation of Novel 7-Substituted-5-(1H-Indol-3-yl)Tetrazolo[1,5-a] Pyrimidine-6-Carbonitrile. Molecules. 2020; 25(2):255. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules25020255
Chicago/Turabian StyleRadwan, Mohamed A. A., Fahad M. Alminderej, and Hanem M. Awad. 2020. "One-Pot Multicomponent Synthesis and Cytotoxic Evaluation of Novel 7-Substituted-5-(1H-Indol-3-yl)Tetrazolo[1,5-a] Pyrimidine-6-Carbonitrile" Molecules 25, no. 2: 255. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules25020255